The use of Lambda probes in heat treatment processes is an innovation from German company MESA.

Germany's MESA is the only company that possesses this technology (calculating carbon potential and dew point values using Lambda signals).

As early as 1992, MESA successfully utilized Lambda probes as oxygen probes in the heat treatment field. In 1993, MESA further employed Lambda probes and dew point controllers in adsorption-type gas generators, thereby bringing significant changes in cost, precision, and lifespan to critical process steps in heat treatment, earning widespread customer recognition. Currently, in the heat treatment industries such as major industrial furnaces and automotive parts manufacturing in Europe, the original conventional oxygen probes have largely been replaced with sampling-type oxygen probes (i.e., Lambda probes).